Movie By Frame - AVI/MPG

Question

Hi there,
I have problem getting a valid FrameGrabbingControl and valid FramePositioningControl.
I've tried many examples. I need to create MoviePlayer with ability to play movie by single frame,
but every time when I try to get:
FrameGrabbingControl fgc = (FrameGrabbingControl)player.getControl("javax.media.control.FrameGrabbingCotrol");
OR
FramePositioningControl fpc = (FramePositioningControl)player.getControl("javax.media.control.FramePositioningCotrol");
I get null.
Can anybody help? I tried to get help on many forums and newsletters without success. I hope that's not mission-impossible :(
I am using, win2k, jdk 1.4.0, JMF 2.1.1

Answer 1

This is a modified version of Suns FrameAccess.java code. I modified it to display text in the screen and create 1 jpg. You can see where I modified it and work from there to suit your needs.
* @(#)FrameAccess.java     1.5 01/03/13
* Copyright (c) 1999-2001 Sun Microsystems, Inc. All Rights Reserved.
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
import java.awt.*;
import javax.media.*;
import javax.media.control.TrackControl;
import javax.media.Format;
import javax.media.format.*;
import java.io.*;
import javax.imageio.*;
import javax.imageio.stream.*;
import java.awt.Color.*;
import java.awt.image.*;
import java.util.*;
import java.awt.image.*;
import javax.media.util.*;
* Sample program to access individual video frames by using a
* "pass-thru" codec. The codec is inserted into the data flow
* path. As data pass through this codec, a callback is invoked
* for each frame of video data.
public class FrameAccess extends Frame implements ControllerListener {
Processor p;
Object waitSync = new Object();
boolean stateTransitionOK = true;
public boolean alreadyPrnt = false;
* Given a media locator, create a processor and use that processor
* as a player to playback the media.
* During the processor's Configured state, two "pass-thru" codecs,
* PreAccessCodec and PostAccessCodec, are set on the video track.
* These codecs are used to get access to individual video frames
* of the media.
* Much of the code is just standard code to present media in JMF.
public boolean open(MediaLocator ml) {
     try {
     p = Manager.createProcessor(ml);
     } catch (Exception e) {
     System.err.println("Failed to create a processor from the given url: " + e);
     return false;
     p.addControllerListener(this);
     // Put the Processor into configured state.
     p.configure();
     if (!waitForState(p.Configured)) {
     System.err.println("Failed to configure the processor.");
     return false;
     // So I can use it as a player.
     p.setContentDescriptor(null);
     // Obtain the track controls.
     TrackControl tc[] = p.getTrackControls();
     if (tc == null) {
     System.err.println("Failed to obtain track controls from the processor.");
     return false;
     // Search for the track control for the video track.
     TrackControl videoTrack = null;
     for (int i = 0; i < tc.length; i++) {
     if (tc.getFormat() instanceof VideoFormat) {
          videoTrack = tc[i];
          break;
     if (videoTrack == null) {
     System.err.println("The input media does not contain a video track.");
     return false;
     System.err.println("Video format: " + videoTrack.getFormat());
     // Instantiate and set the frame access codec to the data flow path.
     try {
     Codec codec[] = { new PreAccessCodec(),
                    new PostAccessCodec()};
     videoTrack.setCodecChain(codec);
     } catch (UnsupportedPlugInException e) {
     System.err.println("The process does not support effects.");
     // Realize the processor.
     p.prefetch();
     if (!waitForState(p.Prefetched)) {
     System.err.println("Failed to realize the processor.");
     return false;
     // Display the visual & control component if there's one.
     setLayout(new BorderLayout());
     Component cc;
     Component vc;
     if ((vc = p.getVisualComponent()) != null) {
     add("Center", vc);
     if ((cc = p.getControlPanelComponent()) != null) {
     add("South", cc);
     // Start the processor.
     p.start();
     setVisible(true);
     return true;
public void addNotify() {
     super.addNotify();
     pack();
* Block until the processor has transitioned to the given state.
* Return false if the transition failed.
boolean waitForState(int state) {
     synchronized (waitSync) {
     try {
          while (p.getState() != state && stateTransitionOK)
          waitSync.wait();
     } catch (Exception e) {}
     return stateTransitionOK;
* Controller Listener.
public void controllerUpdate(ControllerEvent evt) {
     if (evt instanceof ConfigureCompleteEvent ||
     evt instanceof RealizeCompleteEvent ||
     evt instanceof PrefetchCompleteEvent) {
     synchronized (waitSync) {
          stateTransitionOK = true;
          waitSync.notifyAll();
     } else if (evt instanceof ResourceUnavailableEvent) {
     synchronized (waitSync) {
          stateTransitionOK = false;
          waitSync.notifyAll();
     } else if (evt instanceof EndOfMediaEvent) {
     p.close();
     System.exit(0);
* Main program
public static void main(String [] args) {
     if (args.length == 0) {
     prUsage();
     System.exit(0);
     String url = args[0];
     if (url.indexOf(":") < 0) {
     prUsage();
     System.exit(0);
     MediaLocator ml;
     if ((ml = new MediaLocator(url)) == null) {
     System.err.println("Cannot build media locator from: " + url);
     System.exit(0);
     FrameAccess fa = new FrameAccess();
     if (!fa.open(ml))
     System.exit(0);
static void prUsage() {
     System.err.println("Usage: java FrameAccess <url>");
* Inner class.
* A pass-through codec to access to individual frames.
public class PreAccessCodec implements Codec {
* Callback to access individual video frames.
     void accessFrame(Buffer frame) {
     // For demo, we'll just print out the frame #, time &
     // data length.
     long t = (long)(frame.getTimeStamp()/10000000f);
     System.err.println("Pre: frame #: " + frame.getSequenceNumber() +
               ", time: " + ((float)t)/100f +
               ", len: " + frame.getLength());
     * The code for a pass through codec.
     // We'll advertize as supporting all video formats.
     protected Format supportedIns[] = new Format [] {
     new VideoFormat(null)
     // We'll advertize as supporting all video formats.
     protected Format supportedOuts[] = new Format [] {
     new VideoFormat(null)
     Format input = null, output = null;
     public String getName() {
     return "Pre-Access Codec";
     // No op.
public void open() {
     // No op.
     public void close() {
     // No op.
     public void reset() {
     public Format [] getSupportedInputFormats() {
     return supportedIns;
     public Format [] getSupportedOutputFormats(Format in) {
     if (in == null)
          return supportedOuts;
     else {
          // If an input format is given, we use that input format
          // as the output since we are not modifying the bit stream
          // at all.
          Format outs[] = new Format[1];
          outs[0] = in;
          return outs;
     public Format setInputFormat(Format format) {
     input = format;
     return input;
     public Format setOutputFormat(Format format) {
     output = format;
     return output;
     public int process(Buffer in, Buffer out) {
     // This is the "Callback" to access individual frames.
     //accessFrame(in);
               BufferToImage stopBuffer = new BufferToImage((VideoFormat)in.getFormat());
          //System.out.println(stopBuffer.toString());
          //System.out.println("CreatedBuffer");
               //System.out.println("Created stopImage");
               Image stopImage = stopBuffer.createImage(in);
               //System.out.println("stopImage is full");
               if(stopImage == null)
                    System.out.println("stopImage1 is null");
               else
               Graphics sg = stopImage.getGraphics();
               sg.drawString("JMF is great!",10,10);
               ImageToBuffer outImagebuffer = new ImageToBuffer();     
               Buffer myOutbuffer = outImagebuffer.createBuffer(stopImage,30);
               in.copy(myOutbuffer);
          accessFrame(in);
     // Swap the data between the input & output.
     Object data = in.getData();
     in.setData(out.getData());
     out.setData(data);
     // Copy the input attributes to the output
     out.setFormat(in.getFormat());
     out.setLength(in.getLength());
     out.setOffset(in.getOffset());
     return BUFFER_PROCESSED_OK;
     public Object[] getControls() {
     return new Object[0];
     public Object getControl(String type) {
     return null;
public class PostAccessCodec extends PreAccessCodec {
     // We'll advertize as supporting all video formats.
     public PostAccessCodec() {
     supportedIns = new Format [] {
          new RGBFormat()
* Callback to access individual video frames.
     void accessFrame(Buffer frame) {
     // For demo, we'll just print out the frame #, time &
     // data length.
          if(!alreadyPrnt)
          BufferToImage stopBuffer = new BufferToImage((VideoFormat)frame.getFormat());
          System.out.println(stopBuffer.toString());
          System.out.println("CreatedBuffer");
               System.out.println("Created stopImage");
               Image stopImage = stopBuffer.createImage(frame);
               System.out.println("stopImage is full");
               if(stopImage == null)
                    System.out.println("stopImage is null");
               else
               try
               BufferedImage outImage = new BufferedImage (160, 120,BufferedImage.TYPE_INT_RGB);
               Graphics og = outImage.getGraphics();
               og.drawImage(stopImage,0,0,160,120,null);
               //og.drawString("JMF is great!",10,10);
               ImageToBuffer outImagebuffer = new ImageToBuffer();     
               Buffer myOutbuffer = outImagebuffer.createBuffer(stopImage,30);
               frame.copy(myOutbuffer);
                    //prepareImage(outImage,rheight,rheight, null);
                    Iterator writers = ImageIO.getImageWritersByFormatName("jpg");
               ImageWriter writer = (ImageWriter)writers.next();
               //Once an ImageWriter has been obtained, its destination must be set to an ImageOutputStream:
               File f = new File(frame.getSequenceNumber() + ".jpg");
               ImageOutputStream ios = ImageIO.createImageOutputStream(f);
               writer.setOutput(ios);
               //Finally, the image may be written to the output stream:
               //BufferedImage bi;
                    //writer.write(imagebi);
                    writer.write(outImage);
               ios.close();
               catch(IOException e)
                         System.out.println("Error :" + e);
                    alreadyPrnt = true;
                    //we only generate 1 jpg, take out if we want more
     long t = (long)(frame.getTimeStamp()/10000000f);
     System.err.println("Post: frame #: " + frame.getSequenceNumber() +
               ", time: " + ((float)t)/100f +
               ", len: " + frame.getLength());
     public String getName() {
     return "Post-Access Codec";